Dowel connection.



R. W. ERWEN.

DOWEL CONNECTION. APPLICATION FILED SEPT. 29, 1913.

Patented Apr 20, 1915 hymn;

.ollld d e mall. at. .al

To all whom it may concern:

Be it known that I, RAYMOND W. Erwin, a citizen of the United States,residing" at Fremont, in the county of Sandusli'y and State of Ghio,have invented a certain new and useful Improvement in Dowel Connections,of which the following is a full, clear, and exact description.

In a common form of dry battery, the binding posts consist of a screwand a knurled hut, one particular form having a screw retained in a holein the carbon rod.

My invention relates to this latter dowel.

type. The carbon electrode surrounded. by an exciting nnx is packed in azinc container and closed with a sealing layer. Various forms of carbonelectrodes have been used, among Which a corrugated. electrode has beenfound to be particularly advantageous. These may either be molded orforced through a hydraulic machine, the latter being the preferablemethod ,on account of its cheapness. If a dowel pin connection is used,and the corrugated electrode is placed. flush with or projecting fromthe seal, the sealing material Will not flow evenly between thecorrugations, and will present a poor appearance.

It is the object of my invention to provi e a dowel terminal thatpermits the use of a corrugated electrode and at the same time secure aneat seal with the top layer of pitch or analogous material.

Referring to the drawings: Figure 1 is a cross sectional View of theupper portion of a dry battery showing the connection. Fig. 2 is anisometric View of the hexagonal nut and corrugated electrode.

Referring to the drawings, carbon electrode l is surrounded by usualexciting de 'iolarizing material 2 consisting o carbon, and pyrolusitemoistened W elect. lotion. The is place. 1 tainer 3 bar a bibulouslining a closed by a 5 cousis various ers such as a corrugated disk ("3,a layer sand *2, and a top seal of glitch 8. The carbon electrode 1 hasa hole 9 therein with an irregular space usually formed by drillingslanting holes 9 at the bottom. The extremity of a dowel 10' has a headportion 11. which is held in the electrode by pouring into the hole asuitable molten metal 12 such as type met-ll. Upon solidifyir theSpecification of letters .Yaten t.

Patented 2G tllilti. a lieation. filed Eeptember as, rare. see.

dowel is held filllll in nut 2.8.

connections with smooth of the seal has been Lop oi the rod. 1'? thisout with a corrugated ll not flow evenly in the cor r'ugation. a a. poorseal results. If the seal 15 in: a eper so as to flow over the top notmake a smooth lit with .cc of the he? goual out of the dowel sci H is,of course, impossible to let thr eal flow over the top the hexagonal no"the connecting Wire is to be clamped 'eagainst. in order to obtain l.neat appearance, 1 shorten the .."'lJiOCl-Q so that the top will reachhole the top of the seal. After has been attached. to the elec- .3 ofthe metal, a i191;- is screwed on so to hold the in place and produ a.

2 between the type metal and the dowel trode by agonal m. connectim 1.1good. c( the electr." tion of of the E lit iii the special construe isclamping nut and arrangement l that my improvement lies. .-.e usual thinnut, l use one with a ejection i l and pour the seal on approiznr telyflush with the end projection as shown the drawing. The seal covers upthe pr gonal periphery of the nut and makes goon contact with the roundbarrel of projection i l. The barrel 14; may be sepa; rate from"; thenut, but the construction shown is preferable.

in addition to the better appearane, a more perfect seal is formed by myimprove ment.

l-la'vir described my invention, What I the elect. alev n11 around 1ode, a to contain the mix, a ending from the receptacle to the bosswhereby the end of the electrode and flange ofsaio nut are covered bysaid carbon. electrode, a metal end oi i electrode having a .3 saidsheath, not

pro out,

having a fl' nge and a cylindrical boss threaded on the-dowel to bindthe sheath tightly in the electrode, aimix around the I electrode, areceptacle for the mix and a seal in the end of the receptacle extendingabove the flange of said nuhtn contact with the

